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December 2006
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2006.12.05 17:45 "Re: Grayscale, or is it?", by Bob Friesenhahn
On Tue, 5 Dec 2006, Joris wrote: > > In other words, if you need to display the TIFF greyscale on an sRGB > monitor, then you're not applying any gamma correction to it, which is > consistent LibTiff RGBA interface implementation, and very likely > consistent with 95% of common practice out there? Right. If you open a grayscale image and it looks fine on a computer display without additional gamma correction, then it must be similar to "sRGB" (which is in itself an attempt to describe what is "normal"). > Do you agree that this most common practice violates the quoted remark > from the spec? It seems to, but the specification authors should not be faulted for not correctly predicting the future. :-) > (I'm not being religious about the spec here, I'm merely trying to sort > things out and arrive at a consensus in the mailing list and mailing > list archive.) It seems that an assumption of "sRGB" (or "Rec.709") for an image which does not otherwise specify its properties is most likely to produce the expected results. Scientific/sensing/rendering users live in a completely different world from the rest of humanity. Bob ====================================== Bob Friesenhahn bfriesen@simple.dallas.tx.us, http://www.simplesystems.org/users/bfriesen/ GraphicsMagick Maintainer, http://www.GraphicsMagick.org/